
import os
import sys

# hierarchy API: __order__ to apply classifier and __properties__ extending basic hierarchy
__order__ = 30
__properties__ = []

def classify(content_obj, tilde_obj):
    ''' classification of organic compounds by content '''
    if len(content_obj['elements']) == 1 and content_obj['contents'][0] == 1: content_obj['tags'].append('single atom')
    return content_obj